Fluorocarbon–hydrocarbon gemini surfactant mixtures in aqueous solution
Fluorocarbon–hydrocarbon gemini surfactant mixtures in aqueous solution
复制标题
水溶液中的氟碳烃双子表面活性剂混合物
DOI：
10.1016/j.colsurfa.2008.09.022
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
M. Abe
中科院分区：
文献类型：
--
作者：
K. Sakai;Megumi Kaji;Y. Takamatsu;K. Tsuchiya;K. Torigoe;K. Tsubone;Tomokazu Yoshimura;K. Esumi;H. Sakai;M. Abe
用静态表面张力、动态光散射和低温透射电子显微镜相结合的方法研究了相反电荷Gemini-Gemini表面活性剂混合物的水溶液性质。本研究使用了两种双子表面活性剂：一种是部分氟化的阳离子双子表面活性剂1，2-bis[dimethyl-(3-perfluorohexyl-2-hydroxypropyl)ammonium]ethane二溴，另一种是具有碳氢尾基的新型阴离子双子表面活性剂(N，N‘-二十二烷基-N，N’-二丙磺酰乙二胺)。协同表面活性剂混合物经常被用来降低混合临界胶束浓度(CMC)，然而，在本研究中没有观察到这样的CMC降低。这表明，碳氟化合物和碳氢化合物尾基之间有限的相互混溶对吸附层的形成起关键作用，而不是静电等吸引人的相互作用。另一方面，在本体溶液中，由于它们的协同作用，可能会自发形成囊泡状的分子聚集体。
The aqueous solution properties of oppositely charged gemini–gemini surfactant mixtures have been studied with a combination of static surface tension, dynamic light scattering (DLS) and cryogenic transmission electron microscope (cryo-TEM) measurements. Two gemini surfactants were employed in this study: one is a partially fluorinated cationic gemini surfactant, 1,2-bis[dimethyl-(3-perfluorohexyl-2-hydroxypropyl)ammonium]ethane dibromide, and the other is a novel anionic gemini surfactant having hydrocarbon tail groups (N,N′-didodecyl-N,N′-dipropanesulfonylethylenediamine). Synergistic surfactant mixtures are frequently exploited to lower the mixed critical micelle concentration (cmc), however, such a decrease in the cmc is not observed in the current study. This suggests that limited mutual miscibility between the fluorocarbon and hydrocarbon tail groups plays a key role for the formation of the adsorbed layer, rather than attractive interactions such as electrostatic forces. On the other hand, spontaneous formation of vesicle-like molecular aggregates is suggested to occur as a result of their synergistic interaction in bulk solution.
影响因子：
3.9
作者：
Oda, R;Huc, I;Talmon, Y
通讯作者：
Talmon, Y